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Finding the Fourth Proportional to 28,696.70, 39,587.78 and 19,141

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Solution

The fourth proportional to 28,696.70, 39,587.78 and 19,141 is: 26,405.46

Step by Step Solution

  1. Step 1: Write the proportion equation
    28,696.70 : 39,587.78 = 19,141 : x
  2. Step 2: Convert to fraction form
    28,696.70/39,587.78 = 19,141/x
  3. Step 3: Cross multiply
    28,696.70x = 39,587.78 × 19,141
  4. Step 4: Simplify right side
    28,696.70x = 757,749,696.98
  5. Step 5: Solve for x
    x = 757,749,696.98/28,696.70
  6. Step 6: Final answer
    x = 26,405.46

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Why These Related Problems?

These problems maintain the same ratio (1.38) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.